proc `$`(cfg: Config): string {....raises: [], tags: [], forbids: [].}

proc `[]=`(sec: Section; key: string; value: string) {....raises: [], tags: [],
    forbids: [].}

proc `[]=`[T](sec: Section; key: string; value: T)

proc evalSection(section, body: NimNode): NimNode {....raises: [], tags: [],
    forbids: [].}

proc loadConfig(filename: string): Config {.
    ...raises: [IOError, OSError, Exception, ValueError, KeyError],
    tags: [ReadDirEffect, ReadIOEffect, WriteIOEffect, RootEffect], forbids: [].}

proc newSection(): Section {....raises: [], tags: [], forbids: [].}

proc writeConfig(cfg: Config; filename: string) {....raises: [IOError],
    tags: [WriteIOEffect], forbids: [].}

macro `[]=`(sec: Section; key: string; value: untyped)

macro eval(cfg: Config; body): untyped

macro eval(section: Section; body): untyped